A、 Evaluate the impedance between the antenna baseplate and the airplane skin.
B、 Record the measured resistance between the antenna baseplate and the airplane skin.
C、 Perform the measurement of the resistance between the antenna baseplate and the airplane skin.
答案：C
A、 Evaluate the impedance between the antenna baseplate and the airplane skin.
B、 Record the measured resistance between the antenna baseplate and the airplane skin.
C、 Perform the measurement of the resistance between the antenna baseplate and the airplane skin.
答案：C
A. The function and operation of each unit in the system should be described. The location of the units shouldn’t be described.
B. The function, operation and location of each unit in the system should be deleted.
C. The function, operation and location of each unit in the system should be described.
A. Light surface blooming, which can occur on items in storage, is not detrimental to the component.
B. Surface blooming, often found on corroded items, has little adverse effect on the component when it is mild.
C. Items in storage tend to have surface blooming which is beneficial to the component.
A. In any process, the velocity is not large.
B. Do not increase this speed in any operation.
C. In any operation, the speed can not be greater than this value.
A. Make sure that there is airflow in the pipe to hinder .
B. Make sure that there is something in the pipe to block the airflow.
C. Make sure that there is nothing in the pipe to hinder airflow.
解析：这道题考察的是关于管道通风的知识。正确答案是C:Make sure that there is nothing in the pipe to hinder airflow.
在管道通风中，我们需要确保管道内没有任何堵塞物，以确保空气能够顺畅地流动。如果管道被堵塞，空气无法流通，会影响到管道的正常使用。
举个生动的例子，就好像我们的呼吸道一样。当我们呼吸时，我们希望空气能够顺畅地进入我们的肺部，如果我们的呼吸道被堵塞，比如说我们感冒时鼻子被堵住了，我们就会感到呼吸困难。所以，保持管道畅通就像是保持我们的呼吸道畅通一样重要。
A. Make sure you press the switch when you hear the boarding music.
B. Make sure you press the switch after you hear the boarding music.
C. Make sure that you hear the boarding music after you push the button.
A. Restrictions on use of cabin pressurization during Takeoff, landing, or in flight shall be noted
B. That portion of the system is used to de-ice all airfoil surfaces once ice is formed.
C. All airfoil surfaces are equipped with that portion of the system to stop ice formation.
A. Utilize an oil-free solution.
B. Use a solution with oil.
C. The oil is not used that contains a solution.
A. There is no influence on your eyes for hydraulic fluid.
B. Hydraulic fluid has no effect on your eyes.
C. Hydraulic fluid can cause eye injury.
A. Deflate the pressure of tire to the certain value.
B. Provide pressure with nitrogen to the required value for the tire.
C. Depressurize the tire to the demanded value.
A. Use a drill bit not less than 45 mm long.
B. Use a drill bit that has a maximum length of 45 mm.
C. The drill bit used is more than 45 mm.
